In this study, a 1061 nm/1064 nm dual-wavelength Nd∶YAG microchip laser is developed. By designing the transmission curve of the thin film coating at the output end of the laser, the threshold pump powers of 1061 nm and 1064 nm lasers are balanced. Using diode lasers as pump source, three groups of working materials with different thickness are tested at room temperature, and the 1061 nm/1064 nm dual-wavelength outputs are observed. The optical length of the resonator is compressed by directly coating the two ends of the microchip crystal to form a resonator. Simultaneously, the multi-longitudinal mode output at a wavelength of 1064 nm wavelength is realized.